That systems processor is incompatible with the elevated system requirements of Windows 8.1 64 Bit and it will hang during installation.

I have a pentium d945 which is able to run windows 8.1. Plus the compatibility check for 8.1 runs fine. Running the 32 bit 8.1 but still hangs when installing

With Bios A11 and Pentium D 900 series Windows 8.1 64 bit installs just fine. You have bad media or bad Ram.

http://windows.microsoft.com/en-US/windows-8/create-reset-refresh-media

Pentium D 820 was Replaced with Pentium D 915.  DELL HH807 Motherboard Bios A11.  Copper Heatsink  305W Tower.

I added a Radeon 6670 Video card.  All drivers are native to windows clean install.  I added directshow legacy feature and installed directx june 2010.  After windows updates everything works as expected.

Most of the hardware uses Native Windows 7/8/10 Drivers with the exception of the Audio Codec.

http://www.dell.com/content/topics/global.aspx/solutions/en/winvista_faqs_rel?c=us&l=en&cs=prem#faq06

1. Dell will qualify Windows Vista for Basic Windows Vista functionality on the following OptiPlex legacy platforms: OptiPlex GX620, GX520, GX280, SX280, GX270, SX270, 210L and 170L
2. Dell will qualify Windows Vista for Basic Windows Vista functionality on the following Latitude legacy platforms: D800, D600, D400, D410, D505, D810, D610, D510, X300
3. Dell will qualify Windows Vista for Basic Windows Vista functionality on the following Dell Precision Workstation legacy platforms: Dell Precision Workstation 360, 470, 650, 370, 380, 670, M60, M70, M20

To run the premium versions of Windows Vista, including the Windows AeroTM  user interface, PC's should be configured with at least 1GB system RAM and 128 MB graphics memory.

To help further optimize the Windows Vista experience Dell recommends 2 GB dual-channel (2-DIMMs) system RAM, a Dual-Core processor, a 7200 rpm Hard Drive and at least a 256 MB discrete graphics card.

http://ftp.us.dell.com/video/R140545.EXE

                         32bit                  Intel Graphics drivers

Intel® Graphics Media Accelerator Driver for Windows* 7 64 (exe)

File name:win7_64_1512754.exe

win7_64_1512754.exe 64bit  Intel Graphics drivers Download
    
Version:15.12.75.4.64.1930     
Date: 10/02/2009     
Status:Latest
Size:22.84 MB     
Language:Multi language
Operating Systems:Windows 7 (64-bit)*, Windows 7 Enterprise, 64-bit version*, Windows 7 Home Basic, 64-bit version*, Windows 7 Home Premium, 64-bit version*, Windows 7 Professional, 64-bit version*, Windows 7 Ultimate, 64-bit version*

Detailed Description

Purpose:

This driver is written specifically for the desktop   Intel ® 945G, 945GZ, 945GC, 945GT, 946GZ, G965, Q963, Q965, G31, G33, G35, Q33, Q35, Express Chipsets and the Mobile Intel®  940GML, 943GML, 945GM, 945GME, 945GMS, GL960, GLE960, GM965, GME965  Express Chipsets and will not function with any other product. View the README file for installation information and the RELEASE NOTES for driver version details. This driver package contains version 15.12.75.4.1930 (8.15.10.1930) for Windows* 7.

Usage:

The software drivers provided on this page are generic versions, and can be used for general purposes. However, computer original equipment manufacturers (OEMs) may have altered the features, incorporated customizations, or made other changes to the software or software packaging they provide. To avoid any potential installation incompatibilities on your OEM system, Intel recommends that you check with your OEM and use the software provided via your system manufacturer.
Intel or the computer original equipment manufacturer (OEM) may not provide technical support for some or all issues that could arise from the usage of this generic version of software drivers.

 
Release Date:     1/24/2007        
Version:     A255.12.01.7010        
Importance:     Recommended        
Download Type:     Driver        
File Format:     Hard-Drive        
File Size:     3MB     

R145551.EXE         32 BIT

R145149.EXE          64 BIT

Compatibility

Systems

http://catalog.update.microsoft.com/v7/site/Home.aspx

Click on this link to go to the Microsoft Update Catalog Website.

In the search box, type Analog Devices.

DirectX June 2010 is also Highly Recommended.

Download DirectX Redist (June 2010) from Official Microsoft ...

Download file, Extract to a folder,  RUN DXSETUP.EXE as Administrator.

The Analog Devices AD198X codec does have WHQL drivers from the Microsoft Catalog.

microsoft catalog Analog Devices 5.12.1.7010   32 BIT

catalog.update.microsoft.com/.../ScopedViewRedirect.aspx

microsoft catalog Analog Devices 5.12.2.7010   64 BIT

catalog.update.microsoft.com/.../ScopedViewRedirect.aspx

Supported Update IDs

R145551.EXE         32 BIT

R145149.EXE          64 BIT